Also known as: basic sediment and water

BS&W refers to the volume of non-hydrocarbon contaminants contained in a cargo of crude oil. Usually, this is made up of dirt (sediment) and water.

Lower BS&W is better. Acceptable levels of BS&W are 1% or lower.

Sediment and water are separated from crude typically by letting the crude rest in a storage tank until the sediment and water settle to the bottom. Water can be pumped out, but sediment usually accumulates in the tank until the tank is taken out of service and cleaned.

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